Georgia Indian Plantain

Arnoglossum sulcatum occurs in the Florida panhandle and adjacent Georgia and Alabama.

Plants 70–140 cm. Stems strongly ridged (glabrous or sparsely pubescent). Basal leaves: (petioles 10–45 cm) blades (with 3 main veins from bases) broadly ovate or elliptic, 12–15(–20) cm (bases cuneate, decurrent onto petioles), margins entire, sinuate, crenulate, or denticulate. Cauline leaves: proximal petiolate or sessile (mid stem sessile, bases broadly cuneate), blades narrowly ovate, margins entire, sinuate, crenulate, or denticulate; distal petiolate or sessile, smaller. Involucres (8–)9.5–10(–12) mm. Phyllaries (pale green) ovate, midvein wings uniform or highest at apices. Corollas white or greenish, sometimes tinged with purple, 7–8(–9.5) mm. Cypselae fusiform or clavate, 4 mm (dark brown, 6–8-ribbed); pappi 5–7 mm. 2n = 50.

Cacalia sulcata Fernald, Bot. Gaz. 33: 157. 1902; Mesadenia sulcata (Fernald) Small

Arnoglossum sulcatum, the Georgia Indian plantain, is a North American species of plants in the sunflower family. It is native to the southeastern United States in the states of Mississippi, Alabama, Georgia, and Florida.

Arnoglossum sulcatum is a large plant growing up to 140 cm (56 inches) tall. Flower heads are small but numerous, usually white or pale green, occasionally slightly purplish. The species grows in wet, shaded areas.